Method for Echo Processing in a Pulse-Echo Ranging System
First Claim
1. A method for echo processing in a pulse-echo ranging system, the method comprising:
- transmitting an energy pulse to a target;
receiving echo pulses reflected from the target and converting the received echo pulses into an analog echo signal; and
processing said analog echo signal to identify an echo from said target and determining a distance from a propagation time of the identified echo, an advanced stage of processing being performed digitally;
wherein said step of processing said analog echo signal further comprises;
providing and storing a first derivative of an entire echo signal in digital form; and
digitally processing the stored first derivative of the entire echo signal to identify the echo from the target.
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Abstract
In a pulse-echo ranging system an energy pulse is transmitted to a target, echo pulses are received and converted into an echo signal that is processed to identify an echo from the target and to determine the distance from the propagation time of the identified echo, where the advanced stage of the processing is performed digitally. Instead of storing and processing the echo signal, the first derivative of the whole echo signal is stored in digital form and then processed to allow for storing as large a number of samples possible in a limited memory without reducing the resolution and without complicating the processing.
25 Citations
7 Claims
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1. A method for echo processing in a pulse-echo ranging system, the method comprising:
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transmitting an energy pulse to a target; receiving echo pulses reflected from the target and converting the received echo pulses into an analog echo signal; and processing said analog echo signal to identify an echo from said target and determining a distance from a propagation time of the identified echo, an advanced stage of processing being performed digitally; wherein said step of processing said analog echo signal further comprises; providing and storing a first derivative of an entire echo signal in digital form; and digitally processing the stored first derivative of the entire echo signal to identify the echo from the target. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification